 The 3rd Battalion was activated on 25 July 1968 in the regular army as Company C, 158th Aviation Battalion, an element of the 101st Airborne Division (airmobile), at Fort Riley, Kansas.It was inactivated 16 October 1986 at Fort Campbell, Kentucky and relieved from assignment to the 101st Airborne Division (air assault).The unit was redesignated 16 September 1987 as Headquarters and Headquarters Company, 3rd Battalion, 158th Aviation, but withdrawn from the regular army on 16 September 1988 and allotted to the army reserve at Glenview, Illinois, where it was inactivated and re-allotted to the regular army.